East Pacific Teleconnection Pattern

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: NOAA/NWS/CPC

Publication_Date: ongoing

Title: East Pacific Teleconnection Pattern

Edition:

Geospatial_Data_Presentation_Form:

Series_Information:

Series_Name: NOAA/NWS/CPC Indices and Forecasts

Issue_Identification:

Publication_Information:

Publication_Place: Camp Springs, MD

Publisher: NOAA National Weather Service, Center for Climate Prediction

Other_Citation_Details:

Online_Linkage: http://www.cpc.ncep.noaa.gov/data/teledoc/ep.shtml

Description:

Abstract:

[Source: NOAA Climate Prediction Center, http://www.cpc.ncep.noaa.gov/ ] The EP pattern is evident in all months except August and September, and reflects a north-south dipole of height anomalies over the eastern North Pacific. The northern center is located in the vicinity of Alaska and the west coast of Canada, while the southern center is of opposite sign and is found near, or east of, Hawaii. During strong positive phases of the EP pattern, a deeper than normal trough is located in the vicinity of the Gulf of Alaska/ western North America, and positive height anomalies are observed farther south. This phase of the pattern is associated with a pronounced northeastward extension of the Pacific jet stream toward western North America, and with enhanced westerlies over the Pacific Northwest States, northern California, and sometimes southwestern British Columbia. In contrast, strong negative phases of the EP pattern are associated with a pronounced split-flow configuration over the eastern North Pacific, and with reduced westerlies throughout the region. This circulation is accompanied by a confinement of the climatological mean Pacific trough to the western North Pacific, and possibly with a blocking flow configuration farther east. The most persistent positive phase of the EP-Jet pattern occurred from 1973-1975, and the most persistent negative phase of the pattern occurred from early 1992 through mid-1993. This latter period was dominated by warm episode conditions in the equatorial Pacific, and by two distinct periods of mature ENSO conditions. During this period, the subtropical jet stream was generally stronger than normal and displaced well east of its climatological -mean position toward the southwestern United States. These conditions contributed to an end of prolonged drought conditions in California (Bell and Basist 1994), and brought abundant precipitation to the southwestern United States, particularly during the 1992/93 winter. These conditions were also associated with generally above-normal precipitation over the central United States during the year preceding the onset of the Midwest floods of June-July 1993 (Bell and Janowiak 1995, Chagnon 1996). This enhanced precipitation then contributed to above-normal soil moisture levels throughout the Midwest during the period, and to near-saturated soil conditions just prior to the onset of the floods.

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Bell, G. D., and A. N. Basist, 1994: Seasonal Climate Summary: The global climate of December 1992- January 1993: Mature ENSO conditions continue in the tropical Pacific, California drought abates. J. Climate, 7, 1581-1605. Bell, G. D., and J. E. Janowiak, 1995: Atmospheric circulation associated with the Midwest floods of 1993. Bull. Amer. Met. Soc., 5, 681-695. Chagnon, S. A., 1996: The Great Midwest Flood of 1993, Westview Press, 321 pp.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19500101

Ending_Date: Unknown

Currentness_Reference:Unknown

Status:

Progress: In Work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -180.0

East_Bounding_Coordinate: -120.0

North_Bounding_Coordinate: 45.0

South_Bounding_Coordinate: 0.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > OSCILLATIONS > EAST PACIFIC PATTERN

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > PRESSURE ANOMALIES

Theme_Keyword: East Pacific Pattern

Theme_Keyword: Climate Index

Theme_Keyword: Climate Indices

Theme_Keyword: Forecast Indices

Theme_Keyword: Atmospheric Circulation

Theme_Keyword: Climate Change

Theme_Keyword: Teleconnections

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA

Place_Keyword: OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN

Place_Keyword: OCEAN > PACIFIC OCEAN

Place_Keyword: GEOGRAPHIC REGION > NORTHERN HEMISPHERE

Temporal:

Temporal_Keyword_Thesaurus: GCMD

Temporal_Keyword: Monthly, Seasonal

Temporal_Keyword: Monthly - < Annual

Access_Constraints: Not Available

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: ED O'LENIC

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Contact_Electronic_Mail_Address: Ed.Olenic@noaa.gov

Browse_Graphic:

Browse_Graphic_File_Name: http://www.cpc.ncep.noaa.gov/data/teledoc/eptim.gif

Browse_Graphic_File_Description:

Plotted historical EP Pattern

Browse_Graphic_File_Type: GIF

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: DOC/NOAA/NWS/NCEP/CPC > Climate Prediction Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce

Contact_Person: ED O'LENIC

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Contact_Electronic_Mail_Address: Ed.Olenic@noaa.gov

Resource_Description: East Pacific Pattern

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ascii

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.cpc.ncep.noaa.gov/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.cpc.ncep.noaa.gov/data/teledoc/ep.shtml...

Access_Instructions:

Access to EP documentation, graphs and data

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20030219

Metadata_Review_Date: 20091104

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: SCOTT A. RITZ

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Address: NASA Goddard Space Flight Center

Address: Global Change Master Directory

City: Greenbelt

State_or_Province: Maryland

Postal_Code: 20771

Country: USA

Contact_Voice_Telephone: 301-614-5126

Contact_Facsimile_Telephone: 301-614-5268

Contact_Electronic_Mail_Address: Scott.A.Ritz@nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time